diff --git a/essential/introduction_to_administration.md b/essential/introduction_to_administration.md
index aecb0e3..94dfd11 100644
--- a/essential/introduction_to_administration.md
+++ b/essential/introduction_to_administration.md
@@ -627,6 +627,14 @@ If you want to dig into it I suggest [this](https://wiki.debian.org/Permissions#
 
 > The first of the 4 octal digits which represent permissions contains the setuid and setgid bits. These can be used to override some of the defaults described above but it is not worth getting into details other than to note that the user private groups project collaboration idiom (see below) depends on the behavior of the setgid bit.
 
+## Advanced permissions
+
+| type | value |
+| ---- | ----- |
+| sticky bit | 1 |
+| setgid | 2 |
+| setuid | 4 |
+
 ## Essential programs
 
 Below is a small list of often used programs when dealing with file permissions.